Vulcanizing-mold.



P. D. THROPP. VULOANIZING MOLD.

APPLICATION FILED MAR. 20, 1911.

1,082,373. Patented Deo. 23, 1913.

2 SHEETS-SHEET 1.

P. D. THROPP. VULCANIZING MOLD.

111411101111011 FILED 111111.20. 1911.

1,082,373. Patented 11110.23, 1913.

2 SHEETS-"SHEET 2.

PETER HTI-IHOP?, OF TRENTON, 'NEW Will-mj CIRCULAR WOVEN TIR/E COMPANY, 03?

0F NEW JERSEY.

Specification of Letters latent.

WY, ASSIGNOR T0 THE DE LASKI & THROPP' TRENTON, NEW JERSEY, A CORPORATION vULcnNIzINe-Motn.

Patented Dec. 23, 1913.

Application led lVIa-rch 20, 1911. Serial No. 615,521.

To all whom t may concern:

Be it known that I, PETER Dv TI-Inorr, a citizen of the United States, and resident of Trenton, in the county of Mercer and State of New Jersey, have invented a new and useful Improvement in Vulcanizing-Molds, ot which the following is a specification.

This invention relates to a vulcanizing mold for repairing the outer casings of pneumatic tires and like articles, and has for one of its objects to provide a device of this character which is assembled in a port-able unit.

Another object is to provide apparatus of this character which is adapted to utilize vulcanizing mold members of various sizes, in order that repairs may be made on diii'erent sized casings and different characters of injuries to be repaired.

A further object is to provide means for adequately supporting and confining the portion of the casing being vulcanized, while the device itself provides sufiicient pressure during vulcanization Without the aid of any mechanical means for increasing the pressure.

A further object is to provide a device of this character which may be very quickly and conveniently manipulated, and a Still further object is to provide certain improvements in form, construction and arrangement of the various parts whereby the above mentioned objects and .other objects incident to the nature of the device may be effectively carried out.

One practical embodiment of the invention is represented in the accompanying drawings, in which,

Figure 1 represents a top plan view of the device. Fig. 2 represents a side elevation of the same. Fig. 3 represents a front elevation, parts being broken away, and Fig. 4 a vertical section.

, A standard or upright supporting post is denoted by 1, and is provided with an enlarged base 2 and a reduced upper portion 3. This standard l is preferably made hollow and skeleton in form for the purpose of lightness. A pair of arms 4, 5, are mounted one above the other on the reduced por- ,comprise a main member 7 tion 3, and are' litted to swing thereon in va horizontal direction. These arms 4 and 5 are bent, as clearly shown inl Fig. 3, so that their outer ends lie in the same plane and consequently are fitted to swing toward and away from each other in the same horizontal plane. A pair of set screws 6 are screwthreaded in the arms 4 and 5, and fitted to engage the reduced portion 3 of the standard 1, for temporarilv secu'ringthe arms 4v and 5 in any desired position. l

The outer ends of the arms 4 `and 5 are provided with vertical openings in which are rotatably mounted two sets of clamping jaws, one-for each arm. These jaws each and an auxiliary member 8 adapted to slide and swing, the lutter on the former. toward and away from each other. A pair of screw bolts 9, 10, are mounted one in each member 7 8, of each set of jaws; the bolt 9 being screw-threaded in the jaw 7 and having its endtted in the jaw 8, which end is reduced as shown in dotted lines in Fig. 4. so-as toform a shoulder on the bolt 9 against which the lower portion of the jaw 8 will abut to prevent it from sliding toward the jaw 7. The bolt 10 is rotatably mounted in the jaw 8, and its .end is screw-threaded in the jaw Bynvirtue of this arrangement of the two screw' bolts 9 and 10, the upper ends of the jaws 7, 8, may be swung toward and away from each other bv manipulating the two screw bolts 9 and l0 as follows: The screw bolt 9 will be set so as to allow the lower portion of the jaw 8 Ito be in such proximity to the upright portion of the jaw 7. as the thickness of the article to be gripped requires. The article to be gripped may then be inserted between the upper ends of the jaws 7, 8, and the screw bolt 16 tightened up. thus swinging the upper extremities of the jaws toward each other and into tight pinching engagement with the article therebetween.

The vulcanizing mold proper comprises la core member 11, which is shown in the present case as being in general of the shape of a segment of a circle. hollow and be provided with plates 12, for closing the ends thereof, which plates are This core 11 may be and the tongue 15.

secured to the core by screw bolts 13. Making the core 1 1- hollow, provides for a steam chamber there 'n,which steam chamber is shown as having-'its wall parallel in longitudinal and cross, section with the outer surface of the core for providing equal heat at all portions of the surface 'of the core. This core member 11 is also provided "with de'- pending lugs 11* fitted to engage the clamplng jaws 7, 8, for supporting the vulcanizing mold. The vulcanizing mold also comprises a bead molding member constituted by two side pressure plates, or mold sections, 14, fitted to abut one against each side of the inwardlyV extending tongue 15 of the core 11; which plates 14 may be held in abutting engagement with the core 11 by means of screw bolts 16 passing through both plates These side pressure plates are fitted to engage the marginal portions of a tire casing and are shown as extending about half way up the sides thereof,

and terminating' in relatively thin outer edges. They are also shown in the drawings as being adapted to engage the marginal portions of that form of tire casing known as a clencher casing, but it will be understood that this particular form of the inner faces of the plates 14 is not an essential of the invention. The vulcanizing mold further comprises a tread molding member 17 substantially semi-circular in cross section, which is fitted to engage and rest upon the `outer body portion of the tire casing during vulcanization, and extend far enough down to overlap the outer edges of the side pressure plates 14, so as to provide, together with the said plates, a complete inclosure for that section of the casing being repaired. This'member 17 is provided with a steam chamber 18, which is shown as extending J substantially from end to end thereof, and as having its inner and outer walls parallel in both longitudinal' and cross section, thereby providing equal vulcanizing heat throughout the whole operative face of the member.

The standard 1 is provided with a pair of brackets 19, for supporting the main steam feed pipe 2 0. This pipe 2O is provided at its top with a cross-head 21 tapped to receive the ends of branch supply pipes 22, 23, the other ends of which pipes are tapped into the core proper 11, as shown at 24, Fig. 2,

--and the tread vulcanizing mold member 17,

as shown at 25,Fig. 4, respectively. lThe ends of the core member 11 and vulcanizing mold member 17, opposite the ends connected with the supply pipes, are provided with exhaust steam pipes 26 and 27 respectively. The branch supply pipes 22, 23, may be provided with valves 28, and the exhaust steam pipes 26, 27, with valves 29. The fact that the inlet and 'exhaust pipes are tapped into opposite ends of each member requires the steam to pass throughout the steam chamber in each member before it is exhausted. The main feed pipe 20 may be connected at its lower end with any convenient source of livesteam supply.

The tread vulcanizing mold member 17 1s centrally provided with a screw eye 30 adapted to engage the hook, of a tackle, not shown, for convenient raising and lowering of this member 'when in use.

In operation, acore member of the roper section and length for making'the esiredrepair is secured into the clamping jaws 7, 8,' by clamping the lugs 11* between the said jaws, the fact that the arms 4, 5 are adjustable permitting them to support any desired 'length of core. The tire casing to be repaired is hung on the core, member 11 with the injured part on the core itself. After the injured part has been properly treated preparatory to vulcanization, the side pressure plates 14 are clamped in position on the tongue 15, thus securing the -tire on the core 11, and the tread vulcanizing mold member 17 is lowered into position on the outer body portion of the tire casing, as clearly shown in Figs. 3 and 4. Live steam is then admitted to the steam chambers of the core 11 and member 17, and the action is continued until the proper vulcanization has been elected. The introduction of steam may then be discontinued and the member 17 lifted from the tire, the pressure plates 14 removed therefrom and the tire removed from the apparatus.

It will be seen that this device is arranged to receive, as .mentioned above, vulcanizing molds of various cross sections and lengths, and that its manner ,of use is extremely effective, the `weight of the member 17 itself being suiiicient to provide the necessary pressure over the outer body portion of the tire during vulcanization, while the side pressure plates 14 sufficiently confine the marginal portions of the casing.

It 1s to be understood that various changes may be resorted to in the form, construction and arrangement of the several parts with- Y comprising a core, bead and tread mold members, lugs depending from said core, a support, and means carried by said support fitted to engage the lugs for supporting the core and mold members.

2. Apparatus of the character described comprising a mold including a core, lugs depending therefrom, a support having va pair of arms fitted to swing toward and esence of two witnesses, this 16th day of away from each other, and means rotatably arch 1911. mountedY in the outer ends of the said arms to enga` e the said lugs for supporting the PETER D' THROPP' vcore an mold. Witnesses:

Intestimony, that I claim the foregoing CLIFFORD W. Imm, as my invention, I have signed my name in HENRY P. MESSER.

copies of this patent may be obtained for ive cents nach, by addressing the Commissioner ot Patents,

wsshhrgtonm. C. 

